(CNN) - A so-called "dream ticket" scenario – the idea that Hillary Clinton and Barack Obama could join forces this fall - may have gripped the imaginations of Democrats nationwide – but you can list House Speaker Nancy Pelosi as a skeptic.

"I think that ticket either way is impossible," Pelosi told a New England Cable News reporter Tuesday, pointing to comments from Clinton and her campaign that implied Republican John McCain would make a better commander-in-chief than Obama.

"I think that the Clinton administration has fairly ruled that out by proclaiming that Senator McCain would be a better commander-in-Chief than Obama," she said.

She spoke bluntly about her view that a joint ticket was not in the cards, she said, because "I wanted to be sure I didn't leave any ambiguity."

The California Democrat, who has remained neutral throughout the party's primary process, said she remains an uncommitted superdelegate.

This 58 year old Independent is so inspired by Senator Obama that I donated to his campaign, for the first time since I have voted in any election. So, if he is not the Democratic nominee in November, I'll write in for Blomberg!